The equipment exists. And it's getting cheaper. We're getting auto-parking, pre-braking and radar cruise control at lower and lower price points nowadays. And, in the future, you won't need the truck driver... all transactions can simply be car-to-car.
The nature of those transactions would be the key to making it work. And there would have to be some degree of automation for the first car, also, to prevent subscribers from leading the entire pack into an accident.
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